c)Find the equation of the normal to the curve at the point (1,49)

How do i know the slope of the normail is -1/45?Quote:

The slope of the tangent at x=1 is

http://www.mathhelpforum.com/math-he...d6f67eaf-1.gif

The normal is perpendicular to the tangent, hence invert and negate the tangent slope

The slope of the normal is -1/45 and the normal contains the point (1,49)

Hence, the normal equation at that point is

http://www.mathhelpforum.com/math-he...1ab0b824-1.gif